Can't Diagnose This Problem

[JogaBonito521]

So the bottom leaves of my one plant keep dying off. I can't see to diagnose what is wrong. I know it can't be n p or k deficiency because my leaves showed signs of slight nute burn (crusty spots on the leaves). The rest of the plant looks fantastic, maybe this is just normal?

 

[phatpharmer]

We need more info about your set up such as growing medium, feeding schedule ect... the more info you give the better chances somone can help!


Phatpharmer